Pipeline Construction Precautions

Pipeline Construction Precautions

What are the precautions for the construction and laying of drainage pipes?

1. The pipeline should be laid on the undisturbed soil foundation or the backfilled dense foundation after slotting. When the pipeline is under the roadway, the soil covering on the top of the pipe should not be less than 0.7m.

2. During construction, the rigidity of the pipe ring should be re-examined according to the maximum covering soil on the top of the pipe. If the rigidity of the pipe ring does not meet the design requirements, the use should be stopped immediately; the undisturbed soil conditions on the groove and its sides should be checked , when it is found to be inconsistent with the design requirements, the design should be changed or a corresponding guarantee of the pipeline bearing capacity should be adopted.

Powerful technical measures.

3. When the drainage pipe crosses the railway and highway, measures such as casing should be set up, and the casing design should be implemented in accordance with the relevant regulations of the railway and highway.

4. When the groundwater level is higher than the bottom of the excavation trench, the groundwater level should drop to below 0.5m at the bottom of the trench. During the whole process of laying and backfilling of the pipeline, the bottom of the trough shall not accumulate water or be frozen, and the reduction of groundwater shall not be stopped until the project is not affected by groundwater and the pipeline meets the anti-floating requirements.

5. When the bellows is used as an inverted siphon crossed with other pipes, its working pressure should be less than 0.05Mpa in addition to meeting the product standard of the pipe.

6. The pipeline should be laid in a straight line. When it is necessary to use the corner of the flexible interface or use the flexibility of the pipe for folded or arc laying in special circumstances, the deflection angle and bending arc should be within the scope of installation and use.

7. The technical requirements of pipeline construction such as measurement, precipitation, grooving, groove support and pipeline crossing treatment, pipeline construction in the same groove, etc., should be in accordance with the current national standard "Water Supply and Drainage Pipeline Construction and Acceptance Specifications" GB50268 and the technical regulations for drainage pipelines in the region. Implementation of relevant regulations.